Question

3.
There are 180 multiple choice questions in a test. A candidate gets 4 marks for every
correct answer, and for every un-attempted or wrongly answered questions one mark is
deducted from the total score of correct answers. If a candidate scored 450 marks in the
test how many questions did he answer correctly?​

Answer 1

Step-by-step explanation:

let the no of corrected answer be X

let the no of wrong ans be y

then,

according to first condition

X + y =180

according to second condition

4X - y =450

to solve these equations

we find X =. 126 and y = 54

so total correct ans =126